summaryrefslogtreecommitdiffstats
path: root/drivers/net/ethernet/ti/icssg/icssg_prueth.h
blob: a78c5eb75fb8614e06d43523950a7dcf8def0033 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
/* SPDX-License-Identifier: GPL-2.0 */
/* Texas Instruments ICSSG Ethernet driver
 *
 * Copyright (C) 2018-2022 Texas Instruments Incorporated - https://www.ti.com/
 *
 */

#ifndef __NET_TI_ICSSG_PRUETH_H
#define __NET_TI_ICSSG_PRUETH_H

#include <linux/etherdevice.h>
#include <linux/genalloc.h>
#include <linux/if_vlan.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/net_tstamp.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/of_mdio.h>
#include <linux/of_net.h>
#include <linux/of_platform.h>
#include <linux/phy.h>
#include <linux/remoteproc/pruss.h>
#include <linux/pruss_driver.h>
#include <linux/ptp_clock_kernel.h>
#include <linux/remoteproc.h>

#include <linux/dma-mapping.h>
#include <linux/dma/ti-cppi5.h>
#include <linux/dma/k3-udma-glue.h>

#include <net/devlink.h>

#include "icssg_config.h"
#include "icss_iep.h"
#include "icssg_switch_map.h"

#define PRUETH_MAX_MTU          (2000 - ETH_HLEN - ETH_FCS_LEN)
#define PRUETH_MIN_PKT_SIZE     (VLAN_ETH_ZLEN)
#define PRUETH_MAX_PKT_SIZE     (PRUETH_MAX_MTU + ETH_HLEN + ETH_FCS_LEN)

#define ICSS_SLICE0	0
#define ICSS_SLICE1	1

#define ICSS_FW_PRU	0
#define ICSS_FW_RTU	1

#define ICSSG_MAX_RFLOWS	8	/* per slice */

/* Number of ICSSG related stats */
#define ICSSG_NUM_STATS 60
#define ICSSG_NUM_STANDARD_STATS 31
#define ICSSG_NUM_ETHTOOL_STATS (ICSSG_NUM_STATS - ICSSG_NUM_STANDARD_STATS)

#define IEP_DEFAULT_CYCLE_TIME_NS	1000000	/* 1 ms */

/* Firmware status codes */
#define ICSS_HS_FW_READY 0x55555555
#define ICSS_HS_FW_DEAD 0xDEAD0000	/* lower 16 bits contain error code */

/* Firmware command codes */
#define ICSS_HS_CMD_BUSY 0x40000000
#define ICSS_HS_CMD_DONE 0x80000000
#define ICSS_HS_CMD_CANCEL 0x10000000

/* Firmware commands */
#define ICSS_CMD_SPAD 0x20
#define ICSS_CMD_RXTX 0x10
#define ICSS_CMD_ADD_FDB 0x1
#define ICSS_CMD_DEL_FDB 0x2
#define ICSS_CMD_SET_RUN 0x4
#define ICSS_CMD_GET_FDB_SLOT 0x5
#define ICSS_CMD_ENABLE_VLAN 0x5
#define ICSS_CMD_DISABLE_VLAN 0x6
#define ICSS_CMD_ADD_FILTER 0x7
#define ICSS_CMD_ADD_MAC 0x8

/* In switch mode there are 3 real ports i.e. 3 mac addrs.
 * however Linux sees only the host side port. The other 2 ports
 * are the switch ports.
 * In emac mode there are 2 real ports i.e. 2 mac addrs.
 * Linux sees both the ports.
 */
enum prueth_port {
	PRUETH_PORT_HOST = 0,	/* host side port */
	PRUETH_PORT_MII0,	/* physical port RG/SG MII 0 */
	PRUETH_PORT_MII1,	/* physical port RG/SG MII 1 */
	PRUETH_PORT_INVALID,	/* Invalid prueth port */
};

enum prueth_mac {
	PRUETH_MAC0 = 0,
	PRUETH_MAC1,
	PRUETH_NUM_MACS,
	PRUETH_MAC_INVALID,
};

struct prueth_tx_chn {
	struct device *dma_dev;
	struct napi_struct napi_tx;
	struct k3_cppi_desc_pool *desc_pool;
	struct k3_udma_glue_tx_channel *tx_chn;
	struct prueth_emac *emac;
	u32 id;
	u32 descs_num;
	unsigned int irq;
	char name[32];
	struct hrtimer tx_hrtimer;
	unsigned long tx_pace_timeout_ns;
};

struct prueth_rx_chn {
	struct device *dev;
	struct device *dma_dev;
	struct k3_cppi_desc_pool *desc_pool;
	struct k3_udma_glue_rx_channel *rx_chn;
	u32 descs_num;
	unsigned int irq[ICSSG_MAX_RFLOWS];	/* separate irq per flow */
	char name[32];
};

/* There are 4 Tx DMA channels, but the highest priority is CH3 (thread 3)
 * and lower three are lower priority channels or threads.
 */
#define PRUETH_MAX_TX_QUEUES	4

#define PRUETH_MAX_TX_TS_REQUESTS	50 /* Max simultaneous TX_TS requests */

/* Minimum coalesce time in usecs for both Tx and Rx */
#define ICSSG_MIN_COALESCE_USECS 20

/* data for each emac port */
struct prueth_emac {
	bool is_sr1;
	bool fw_running;
	struct prueth *prueth;
	struct net_device *ndev;
	u8 mac_addr[6];
	struct napi_struct napi_rx;
	u32 msg_enable;

	int link;
	int speed;
	int duplex;

	const char *phy_id;
	struct device_node *phy_node;
	phy_interface_t phy_if;
	enum prueth_port port_id;
	struct icss_iep *iep;
	unsigned int rx_ts_enabled : 1;
	unsigned int tx_ts_enabled : 1;
	unsigned int half_duplex : 1;

	/* DMA related */
	struct prueth_tx_chn tx_chns[PRUETH_MAX_TX_QUEUES];
	struct completion tdown_complete;
	atomic_t tdown_cnt;
	struct prueth_rx_chn rx_chns;
	int rx_flow_id_base;
	int tx_ch_num;

	/* SR1.0 Management channel */
	struct prueth_rx_chn rx_mgm_chn;
	int rx_mgm_flow_id_base;

	spinlock_t lock;	/* serialize access */

	/* TX HW Timestamping */
	/* TX TS cookie will be index to the tx_ts_skb array */
	struct sk_buff *tx_ts_skb[PRUETH_MAX_TX_TS_REQUESTS];
	atomic_t tx_ts_pending;
	int tx_ts_irq;

	u8 cmd_seq;
	/* shutdown related */
	__le32 cmd_data[4];
	struct completion cmd_complete;
	/* Mutex to serialize access to firmware command interface */
	struct mutex cmd_lock;
	struct work_struct rx_mode_work;
	struct workqueue_struct	*cmd_wq;

	struct pruss_mem_region dram;

	struct delayed_work stats_work;
	u64 stats[ICSSG_NUM_STATS];

	/* RX IRQ Coalescing Related */
	struct hrtimer rx_hrtimer;
	unsigned long rx_pace_timeout_ns;
};

/**
 * struct prueth_pdata - PRUeth platform data
 * @fdqring_mode: Free desc queue mode
 * @quirk_10m_link_issue: 10M link detect errata
 */
struct prueth_pdata {
	enum k3_ring_mode fdqring_mode;
	u32	quirk_10m_link_issue:1;
};

struct icssg_firmwares {
	char *pru;
	char *rtu;
	char *txpru;
};

/**
 * struct prueth - PRUeth structure
 * @dev: device
 * @pruss: pruss handle
 * @pru: rproc instances of PRUs
 * @rtu: rproc instances of RTUs
 * @txpru: rproc instances of TX_PRUs
 * @shram: PRUSS shared RAM region
 * @sram_pool: MSMC RAM pool for buffers
 * @msmcram: MSMC RAM region
 * @eth_node: DT node for the port
 * @emac: private EMAC data structure
 * @registered_netdevs: list of registered netdevs
 * @miig_rt: regmap to mii_g_rt block
 * @mii_rt: regmap to mii_rt block
 * @pru_id: ID for each of the PRUs
 * @pdev: pointer to ICSSG platform device
 * @pdata: pointer to platform data for ICSSG driver
 * @icssg_hwcmdseq: seq counter or HWQ messages
 * @emacs_initialized: num of EMACs/ext ports that are up/running
 * @iep0: pointer to IEP0 device
 * @iep1: pointer to IEP1 device
 */
struct prueth {
	struct device *dev;
	struct pruss *pruss;
	struct rproc *pru[PRUSS_NUM_PRUS];
	struct rproc *rtu[PRUSS_NUM_PRUS];
	struct rproc *txpru[PRUSS_NUM_PRUS];
	struct pruss_mem_region shram;
	struct gen_pool *sram_pool;
	struct pruss_mem_region msmcram;

	struct device_node *eth_node[PRUETH_NUM_MACS];
	struct prueth_emac *emac[PRUETH_NUM_MACS];
	struct net_device *registered_netdevs[PRUETH_NUM_MACS];
	struct regmap *miig_rt;
	struct regmap *mii_rt;

	enum pruss_pru_id pru_id[PRUSS_NUM_PRUS];
	struct platform_device *pdev;
	struct prueth_pdata pdata;
	u8 icssg_hwcmdseq;
	int emacs_initialized;
	struct icss_iep *iep0;
	struct icss_iep *iep1;
};

struct emac_tx_ts_response {
	u32 reserved[2];
	u32 cookie;
	u32 lo_ts;
	u32 hi_ts;
};

struct emac_tx_ts_response_sr1 {
	__le32 lo_ts;
	__le32 hi_ts;
	__le32 reserved;
	__le32 cookie;
};

/* get PRUSS SLICE number from prueth_emac */
static inline int prueth_emac_slice(struct prueth_emac *emac)
{
	switch (emac->port_id) {
	case PRUETH_PORT_MII0:
		return ICSS_SLICE0;
	case PRUETH_PORT_MII1:
		return ICSS_SLICE1;
	default:
		return -EINVAL;
	}
}

extern const struct ethtool_ops icssg_ethtool_ops;
extern const struct dev_pm_ops prueth_dev_pm_ops;

/* Classifier helpers */
void icssg_class_set_mac_addr(struct regmap *miig_rt, int slice, u8 *mac);
void icssg_class_set_host_mac_addr(struct regmap *miig_rt, const u8 *mac);
void icssg_class_disable(struct regmap *miig_rt, int slice);
void icssg_class_default(struct regmap *miig_rt, int slice, bool allmulti,
			 bool is_sr1);
void icssg_class_promiscuous_sr1(struct regmap *miig_rt, int slice);
void icssg_class_add_mcast_sr1(struct regmap *miig_rt, int slice,
			       struct net_device *ndev);
void icssg_ft1_set_mac_addr(struct regmap *miig_rt, int slice, u8 *mac_addr);

/* config helpers */
void icssg_config_ipg(struct prueth_emac *emac);
int icssg_config(struct prueth *prueth, struct prueth_emac *emac,
		 int slice);
int emac_set_port_state(struct prueth_emac *emac,
			enum icssg_port_state_cmd state);
void icssg_config_set_speed(struct prueth_emac *emac);
void icssg_config_half_duplex(struct prueth_emac *emac);

/* Buffer queue helpers */
int icssg_queue_pop(struct prueth *prueth, u8 queue);
void icssg_queue_push(struct prueth *prueth, int queue, u16 addr);
u32 icssg_queue_level(struct prueth *prueth, int queue);

#define prueth_napi_to_tx_chn(pnapi) \
	container_of(pnapi, struct prueth_tx_chn, napi_tx)

void emac_stats_work_handler(struct work_struct *work);
void emac_update_hardware_stats(struct prueth_emac *emac);
int emac_get_stat_by_name(struct prueth_emac *emac, char *stat_name);

/* Common functions */
void prueth_cleanup_rx_chns(struct prueth_emac *emac,
			    struct prueth_rx_chn *rx_chn,
			    int max_rflows);
void prueth_cleanup_tx_chns(struct prueth_emac *emac);
void prueth_ndev_del_tx_napi(struct prueth_emac *emac, int num);
void prueth_xmit_free(struct prueth_tx_chn *tx_chn,
		      struct cppi5_host_desc_t *desc);
int emac_tx_complete_packets(struct prueth_emac *emac, int chn,
			     int budget, bool *tdown);
int prueth_ndev_add_tx_napi(struct prueth_emac *emac);
int prueth_init_tx_chns(struct prueth_emac *emac);
int prueth_init_rx_chns(struct prueth_emac *emac,
			struct prueth_rx_chn *rx_chn,
			char *name, u32 max_rflows,
			u32 max_desc_num);
int prueth_dma_rx_push(struct prueth_emac *emac,
		       struct sk_buff *skb,
		       struct prueth_rx_chn *rx_chn);
void emac_rx_timestamp(struct prueth_emac *emac,
		       struct sk_buff *skb, u32 *psdata);
enum netdev_tx emac_ndo_start_xmit(struct sk_buff *skb, struct net_device *ndev);
irqreturn_t prueth_rx_irq(int irq, void *dev_id);
void prueth_emac_stop(struct prueth_emac *emac);
void prueth_cleanup_tx_ts(struct prueth_emac *emac);
int emac_napi_rx_poll(struct napi_struct *napi_rx, int budget);
int prueth_prepare_rx_chan(struct prueth_emac *emac,
			   struct prueth_rx_chn *chn,
			   int buf_size);
void prueth_reset_tx_chan(struct prueth_emac *emac, int ch_num,
			  bool free_skb);
void prueth_reset_rx_chan(struct prueth_rx_chn *chn,
			  int num_flows, bool disable);
void emac_ndo_tx_timeout(struct net_device *ndev, unsigned int txqueue);
int emac_ndo_ioctl(struct net_device *ndev, struct ifreq *ifr, int cmd);
void emac_ndo_get_stats64(struct net_device *ndev,
			  struct rtnl_link_stats64 *stats);
int emac_ndo_get_phys_port_name(struct net_device *ndev, char *name,
				size_t len);
int prueth_node_port(struct device_node *eth_node);
int prueth_node_mac(struct device_node *eth_node);
void prueth_netdev_exit(struct prueth *prueth,
			struct device_node *eth_node);
int prueth_get_cores(struct prueth *prueth, int slice, bool is_sr1);
void prueth_put_cores(struct prueth *prueth, int slice);

/* Revision specific helper */
u64 icssg_ts_to_ns(u32 hi_sw, u32 hi, u32 lo, u32 cycle_time_ns);

#endif /* __NET_TI_ICSSG_PRUETH_H */